Meiosis 3D | Meiosis cell division I Meiosis and Mitosis |Prophase |Anaphase I Meataphse | Telophase

Meiosis is the cell division process that produces gametes, also known as sex cells like sperm and egg. It is divided into two main stages: Meiosis I and Meiosis II, each containing four phases: prophase, metaphase, anaphase, and telophase.

Meiosis I begins with Prophase 1, where a diploid cell's chromatin replicates and condenses into X-shaped chromosomes. Homologous chromosomes pair up in a process called synapsis, forming a tetrad. Crossing over occurs, where genetic material is exchanged, creating new gene combinations. The nuclear membrane disappears, and spindle fibers emerge.

In Metaphase 1, homologous chromosomes align at the cell's equator. During Anaphase 1, spindle fibers separate homologous chromosomes, pulling them to opposite poles. In Telophase 1, one chromosome from each homologous pair reaches a pole, and the nuclear envelope reforms. Cytokinesis then occurs, resulting in two genetically distinct haploid daughter cells, each with paired sister chromatids.

Meiosis II begins with the two haploid cells. DNA is not replicated again. In Prophase 2, the nuclear envelope disappears, and spindle fibers form. During Metaphase 2, chromosomes align at the equator. Anaphase 2 sees the sister chromatids separate and move to opposite poles. Finally, in Telophase 2, spindle fibers disappear, the nuclear membrane regenerates, and cytokinesis occurs. This results in four genetically distinct haploid daughter cells, each containing one set of chromosomes.